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衛(wèi)星移動(dòng)通信控制信道的軟件實(shí)現(xiàn)

發(fā)布時(shí)間:2019-05-29 05:34
【摘要】:衛(wèi)星移動(dòng)通信是指以衛(wèi)星作為信號(hào)中轉(zhuǎn)媒介的移動(dòng)通信方法。相比于地面蜂窩移動(dòng)通信,其具有覆蓋范圍廣、不受地理環(huán)境和通信距離限制等諸多優(yōu)勢(shì)。此外在特殊時(shí)期(臺(tái)風(fēng)、地震等),地面蜂窩移動(dòng)通信設(shè)備容易受到影響從而難以保證通信,而衛(wèi)星移動(dòng)通信則彌補(bǔ)了這個(gè)缺點(diǎn)。要實(shí)現(xiàn)完整的衛(wèi)星通信鏈路,地面上必須要有可靠的衛(wèi)星移動(dòng)通信信關(guān)站接收衛(wèi)星信號(hào)。在衛(wèi)星通信設(shè)備研發(fā)過(guò)程中,經(jīng)常需要穩(wěn)定的模擬信關(guān)站系統(tǒng)進(jìn)行測(cè)試,以確保終端設(shè)備或星上設(shè)備的功能完整性和可靠性。傳統(tǒng)的模擬信關(guān)站一般都是基于硬件平臺(tái)(如FPGA、DSP等),然而硬件平臺(tái)的維護(hù)成本和擴(kuò)展成本都較高,而且不便于平臺(tái)移植。本文的主要工作就是基于GMR-1衛(wèi)星通信協(xié)議,研發(fā)了一款基于軟件無(wú)線電的物理層模擬信關(guān)站系統(tǒng)。該課題詳細(xì)設(shè)計(jì)了物理層軟件實(shí)現(xiàn)架構(gòu),采用Python+C的編程模式和多線程的實(shí)現(xiàn)技術(shù)來(lái)保證軟件的運(yùn)行效率。整個(gè)系統(tǒng)具有良好的可擴(kuò)展性、可維護(hù)性和可移植性。此外我們還為模擬信關(guān)站系統(tǒng)研發(fā)了一套可視化的用戶操作界面,大大提高了測(cè)試效率。該界面前臺(tái)使用CSS做渲染,使用Jinja做顯示控制,使用JavaScript實(shí)現(xiàn)實(shí)時(shí)狀態(tài)的顯示,前臺(tái)與后臺(tái)的通信主要通過(guò)Http協(xié)議實(shí)現(xiàn)。
[Abstract]:Satellite mobile communication refers to the mobile communication method in which the satellite is used as the signal transit medium. Compared with terrestrial cellular mobile communication, it has many advantages, such as wide coverage, not limited by geographical environment and communication distance. In addition, in special periods (typhoons, earthquakes, etc.), ground cellular mobile communication equipment is vulnerable to be affected, so it is difficult to ensure communication, and satellite mobile communication makes up for this disadvantage. In order to realize the complete satellite communication link, there must be a reliable satellite mobile communication station to receive the satellite signal on the ground. In the process of satellite communication equipment research and development, stable analog gateway station system is often needed to ensure the functional integrity and reliability of terminal equipment or on-board equipment. Traditional analog gateway stations are generally based on hardware platform (such as FPGA,DSP, etc.). However, the maintenance cost and expansion cost of hardware platform are high, and it is not convenient for platform transplantation. The main work of this paper is to develop a physical layer analog gateway station system based on software radio based on GMR-1 satellite communication protocol. In this paper, the physical layer software implementation architecture is designed in detail, and the programming mode of Python C and multi-thread implementation technology are used to ensure the running efficiency of the software. The whole system has good scalability, maintainability and portability. In addition, we also developed a set of visual user interface for the analog gateway system, which greatly improved the test efficiency. The front desk of the interface uses CSS for rendering, Jinja for display control, JavaScript for real-time state display, and the communication between foreground and background is mainly realized through Http protocol.
【學(xué)位授予單位】:天津大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TN927.23

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